Fix

src/DataStreams/PostgreSQLBlockInputStream.cpp

@@ -18,6 +18,7 @@
 #include <ext/range.h>
 #include <common/logger_useful.h>
 
+
 namespace DB
 {
 
@@ -26,7 +27,6 @@ namespace ErrorCodes
     extern const int BAD_ARGUMENTS;
 }
 
-
 PostgreSQLBlockInputStream::PostgreSQLBlockInputStream(
     ConnectionPtr connection_,
     const std::string & query_str_,

src/DataStreams/PostgreSQLBlockInputStream.h

@@ -11,6 +11,7 @@
 #include <Core/Field.h>
 #include <pqxx/pqxx>
 
+
 namespace DB
 {
 using ConnectionPtr = std::shared_ptr<pqxx::connection>;

src/Databases/PostgreSQL/DatabasePostgreSQL.cpp

@@ -101,7 +101,12 @@ bool DatabasePostgreSQL::checkPostgresTable(const String & table_name) const
 
     try
     {
-        pqxx::result result = tx.exec(fmt::format("select '{}'::regclass", table_name));
+        /// Casting table_name::regclass throws pqxx::indefined_table exception if table_name is incorrect.
+        pqxx::result result = tx.exec(fmt::format(
+                    "SELECT '{}'::regclass, tablename "
+                    "FROM pg_catalog.pg_tables "
+                    "WHERE schemaname != 'pg_catalog' AND schemaname != 'information_schema' "
+                    "AND tablename = '{}'", table_name, table_name));
     }
     catch (pqxx::undefined_table const &)
     {

src/Databases/PostgreSQL/DatabasePostgreSQL.h

@@ -11,6 +11,7 @@
 #include <Parsers/ASTCreateQuery.h>
 #include <Storages/StoragePostgreSQL.h>
 
+
 namespace DB
 {
 

src/Databases/PostgreSQL/FetchFromPostgreSQL.cpp

@@ -14,6 +14,7 @@
 #include <boost/algorithm/string/trim.hpp>
 #include <pqxx/pqxx>
 
+
 namespace DB
 {
 
@@ -57,6 +58,11 @@ std::shared_ptr<NamesAndTypesList> fetchPostgreSQLTableStructure(ConnectionPtr c
                     "PostgreSQL table {}.{} does not exist",
                     connection->dbname(), postgres_table_name), ErrorCodes::UNKNOWN_TABLE);
     }
+    catch (Exception & e)
+    {
+        e.addMessage("while fetching postgresql table structure");
+        throw;
+    }
 
     if (columns.empty())
         return nullptr;

src/Databases/PostgreSQL/FetchFromPostgreSQL.h

@@ -7,6 +7,7 @@
 #if USE_LIBPQXX
 #include <Storages/StoragePostgreSQL.h>
 
+
 namespace DB
 {
 

src/Dictionaries/PostgreSQLDictionarySource.cpp

@@ -11,6 +11,7 @@
 #include "readInvalidateQuery.h"
 #endif
 
+
 namespace DB
 {
 

src/Dictionaries/PostgreSQLDictionarySource.h

@@ -14,6 +14,7 @@
 #include <Storages/StoragePostgreSQL.h>
 #include <pqxx/pqxx>
 
+
 namespace DB
 {
 

src/Storages/StoragePostgreSQL.cpp

@@ -157,8 +157,10 @@ public:
     void writeSuffix() override
     {
         if (stream_inserter)
+        {
             stream_inserter->complete();
-        work->commit();
+            work->commit();
+        }
     }
 
 

src/Storages/StoragePostgreSQL.h

@@ -11,6 +11,7 @@
 #include <DataStreams/IBlockOutputStream.h>
 #include "pqxx/pqxx"
 
+
 namespace DB
 {
 

src/TableFunctions/TableFunctionPostgreSQL.cpp

@@ -11,6 +11,7 @@
 #include "registerTableFunctions.h"
 #include <Databases/PostgreSQL/FetchFromPostgreSQL.h>
 
+
 namespace DB
 {
 

src/TableFunctions/TableFunctionPostgreSQL.h

@@ -8,6 +8,7 @@
 #include <Storages/StoragePostgreSQL.h>
 #include "pqxx/pqxx"
 
+
 namespace DB
 {